The grasshopper genus Philocleon, with six previously known species (nigrovittatus (Stal), spatulatus Roberts, anomalus Roberts, luceroae Fontana and Buzzetti, scudderi (Hebard), and ottei Fontana & Buzzetti), is revised to include the following eight new species: zygon, zima, illa, cledon, axiton, azumai, iropon, and erissa. The subspecies nigrovittatus spatulatus Roberts is raised to species status. The fourteen species are placed into the four following species groups: Anomalus group, Illa group, Nigrovittatus group, and Scudderi group.